Question

What Is Force.

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Answer 1

$\huge{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R᭄}}}}$

$\bf\pink{Force :}$

• A force is an effort that changes the state of an object at rest or at motion.

• It can change an object's direction and velocity.

• Force can also change the shape of an object.

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$\boxed{\text{More to know :}}$

$\sf{\underline{\overline{\purple{ Types \: of \: Force :}}}}$

✦ Normal force :

• The normal force is the force that surfaces exert to prevent solid objects from passing through each other.

✦ Applied force :

• An applied force is a force that is applied to an object by a person or another object.

✦ Frictional force :

• Frictional force refers to the force generated by two surfaces that contacts and slide against each other.

✦ Tension force :

• The tension force is defined as the force that is transmitted through a rope, string or wire when pulled by forces acting from opposite sides.

✦ Spring force :

• The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it.

✦ Resisting force :

• Resistive force is a force, or the vector sum of numerous forces, whose direction is opposite to the motion of a body.

Answer 2

$\huge \mathfrak{ \pmb{ \colorbox{lavender}{ \: \: \: \: \: \: \red F \: \blue O \: \green R \: \purple C \: \orange E \: \: \: \: \: \: }}}$

Force is push or pull acting on a body which tends to change its state of rest or of motion. It is denoted by "F". It has a magnitude and a direction.

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$\large \red{\bold{Formula \ for \ Force \: : - } }$

$\huge\underline{\boxed{\textrm{F = {\texttt{ma}}}}}$

Here,

" m " = Mass of the body

" a " = Acceleration

" F " = Force

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Derivation of Force [ F = ma ] using Newton's law of motion.

$\small{\bold{Newton's\:Second\:Law \ states \ that \ :-}}\\ \tiny \: \tt \: The \: rate \: of change \: of \: momentum \: of \: an \: object \\ \tiny \tt depends \: upon \: the \: direction \: and \: magnitude \: of \: applied \: force.$

$\blue{\large{\bf{F \propto \cfrac{dp}{dt}}} }$

$\blue{\large{ \ \bf{F \propto \cfrac{d(mv - mu)}{dt}}} }$

$\blue{\large{ \ \bf{F = k.m \cfrac{d(v - u)}{dt}}} }$

$\blue{\large{\ \bf{F = k.ma}} \quad \quad \: \: \: \tt{[If, k = 1]}}$

$\blue{\large{\leadsto \ \underline{\boxed{\bf{ \pmb{F = ma}}}}}}$

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Unit of Force :-

• SI unit of force is Newton(N).
• C.G.S (centimetre gram second) unit of force is Dyne.

Effects of force -

• Force can change the direction of a moving object.
• Force can change the shape and size of an object.
• Force can change the speed of a moving object.
• Force can change a body′s state of motion or rest.

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Force is classified into two category:-

Contact Force

• Muscular Force
• Frictional Force
• Normal Force
• Applied force
• Tension Force
• Spring Force
• Air resisting Force

Non−contact Force

• Gravitational Force
• Magnetic Force
• Electrostatic Force